Group Dungeons are dungeons that are built for 4 players so if you enter these alone, you won't even gonna make it pass the first wave of enemies.
Your group should consist of 1 healer, 2 damage dealers and 1 tank but some dungeons doesn't require a tank.
Having a healer is essential for survival so make sure you have one in your group.
Clearing veteran version of these dungeon do NOT count toward this achievement.
There are 5 group dungeons in each faction, 1 in each zone. The Ebonheart Pact dungeons are the following:
- Fungal Grotto
- Darkshade Caverns
- Arx Corinium
- Direfrost Keep
- Blessed Crucible
To get this achievement, you have to get 5 in game achievements that belong to each dungeon. Each achievement requires your group to kill certain bosses in that dungeon, you can check your progress in the in game achievement menu.
- Fungal Grotto Vanquisher: Defeat the Goblin War Chief and the Dreugh King at the Fungal Grotto.
- Darkshade Caverns Vanquisher: Defeat Foreman Llothan, the Hive Lord, and the Sentinel of Rkugamz.
- Arx Corinium Vanquisher: Defeat the Ancient Wamasu, the Lamia Songstress, and the Lamia Queen.
- Direfrost Keep Vanquisher: Defeat the Guardian of the Flame, the Empowered Frost Atronach, and Drodda of Icereach at Direfrost Keep.
- Blessed Crucible Vanquisher: Defeat the Pack, the Beast Master, and the Lava Queen at the Blessed Crucible.
The bosses that are required for the achievements are always in your main path so they are impossible to miss.
These are very easy compare to the other factions' dungeon.
If you can not get darkshade caverns vanquisher achievement because you're missing the 'Sentinel of Rkugamz' then you need to kill the 'Cutting Sphere' boss before killing the 'Sentinel of Rkugamz'. The Cutting Sphere is located to the right of the Sentinel of Rkugamz's area. So instead of going left to fight the sentinel, you need to go right to fight the sphere first. Also you need to have killed every other bosses in this dungeon.